From: Rusty Russell <rusty@rustcorp.com.au>
Date: Sat, 13 Jun 2009 04:27:09 +0000 (-0600)
Subject: lguest: use eventfds for device notification
X-Git-Tag: v2.6.31-rc1~368^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=df60aeef4f4fe0645d9a195a7689005520422de5;p=pandora-kernel.git

lguest: use eventfds for device notification

Currently, when a Guest wants to perform I/O it calls LHCALL_NOTIFY with
an address: the main Launcher process returns with this address, and figures
out what device to run.

A far nicer model is to let processes bind an eventfd to an address: if we
find one, we simply signal the eventfd.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Davide Libenzi <davidel@xmailserver.org>
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